Dynamics of thermal annealing of fiber gratings directly written by an infrared femtosecond laser


The inscription of fibre Bragg gratings using infrared femtosecond laser offers a number of advantages over conventional methods based on UV inscription. The refractive index modification in femtosecond inscription is independent on defect formation and therefore should not experiment the defect-related thermal decay of UV inscribed gratings. In this paper, the response to thermal annealing of fiber Bragg gratings inscribed using a tightly focussed femtosecond laser is investigated. Experimental results reveal a vastly improve thermal stability compared to gratings inscribed using conventional methods based on UV light. Erasure was not observed until temperatures in the range between 900°C and 1000°. These devices are therefore particularly suited to work in hostile environments and as high temperature sensors.

Publication DOI: https://doi.org/10.1117/12.605551
Divisions: College of Engineering & Physical Sciences
Additional Information: Copyright 2005 SPIE. One print or electronic copy may be made for personal use only. Systematic reproduction, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Uncontrolled Keywords: Femtosecond inscription,Fiber Bragg gratings,Thermal annealing,Electrical and Electronic Engineering,Condensed Matter Physics
Publication ISSN: 1996-756X
Last Modified: 25 Mar 2024 08:36
Date Deposited: 15 Nov 2019 15:25
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.spi ... 5551.full?SSO=1 (Publisher URL)
PURE Output Type: Conference article
Published Date: 2005-11-15
Authors: Martinez, A.
Khrushchev, I.
Bennion, I.



Version: Published Version

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